Rotary hydraulic engineering gate and using method thereof

Abstract

The invention provides a rotary water conservancy project gate and a using method thereof.The rotary water conservancy project gate comprises a gate frame poured on a river channel, a gate shaft is rotationally connected to the center of the gate frame, a gate matched with the gate frame is fixedly connected to the bottom of the gate shaft, and the two sides and the bottom of the gate abut against the inner wall of the gate frame in a sealed mode; an opening and closing mechanism capable of driving the gate shaft to rotate to be opened and closed is installed at the top of the gate frame, suspension arms capable of moving in the radial direction are installed on the two sides of the gate, the suspension arms are arranged perpendicular to the gate, a liftable blocking net is arranged below the suspension arms in the length direction of the suspension arms, and the blocking net is used for intercepting floating objects on the water surface. The gate is high in opening and closing speed, quick response can be achieved during maximum flood discharge, the rotary opening mode is high in stability, parts cannot be rusted, floating objects on the water surface can be intercepted in the conventional use stage, and river channel garbage can be cleared away.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic gates, and in particular to a rotary hydraulic engineering gate and a use method thereof. Background Art

[0002] Gates are control facilities used to close and open water discharge channels. They are an important part of water conservancy projects and can be used to intercept water flow, control water levels, regulate flow, discharge sediment and floating objects, etc. The opening and closing of gates usually requires a hoist. Currently, the hoist is mainly installed by installing a screw hoist, which drives the screw up and down to open and close the gate.

[0003] However, the existing screw-type gate opening and closing speed is slow, and the response speed is slow when maximum flood discharge is required. In addition, the screw is prone to rust, which can easily cause opening and closing obstacles. Summary of the invention

[0004] In response to the above problems, the present invention provides a rotary water conservancy project gate and a method of using the same. The gate has a fast opening and closing speed and can respond quickly when maximizing flood discharge. The rotary opening method has high stability, and the parts will not rust. It can also intercept floating objects on the water surface and clean up river garbage during normal use.

[0005] To solve the above problems, the technical solution adopted by the present invention is:

[0006] A rotary water conservancy project gate comprises a gate frame cast on a river channel, a gate shaft is rotatably connected to the center of the gate frame, a gate adapted to the gate frame is fixedly connected to the bottom of the gate shaft, both sides and the bottom of the gate are in contact and sealed with the inner wall of the gate frame, an opening and closing mechanism that can drive the gate shaft to rotate and open and close is installed on the top of the gate frame, radially movable hanging arms are installed on both sides of the gate, the hanging arms are arranged perpendicular to the gate, and a liftable retaining net is arranged below the hanging arm along its length direction, and the retaining net is used to intercept floating objects on the water surface.

[0007] Preferably, the opening and closing mechanism includes an opening and closing box fixedly installed on the top of the gate frame, the upper end of the gate shaft extends into the opening and closing box and is fixedly connected to a gear disk, and a plurality of rotating shafts are rotatably connected around the gear disk in the opening and closing box, and a large gear meshing with the gear disk is fixedly connected to the rotating shaft. A driving mechanism that can synchronously drive the rotation of multiple large gears is also installed in the opening and closing box, and the multiple large gears jointly drive the gear disk to rotate.

[0008] Preferably, the driving mechanism comprises a first transmission assembly and a plurality of second transmission assemblies, the first transmission assembly is used to synchronously drive the plurality of second transmission assemblies, and the plurality of second transmission assemblies correspond one-to-one to the plurality of large gears.

[0009] Preferably, the first transmission assembly includes a circular cavity arranged at the top of the opening and closing box, a first motor is fixedly installed on the top of the opening and closing box, an output end of the first motor extends into the circular cavity and is fixedly connected to a first bevel gear, a plurality of transmission shafts are rotatably connected to the circumferential inner wall of the circular cavity, a second bevel gear meshing with the first bevel gear is fixedly connected to the transmission shaft, and the end of the transmission shaft is used to drive the second transmission assembly.

[0010] Preferably, the second transmission assembly includes a plurality of transmission grooves radially opened at the top of the opening and closing box, a threaded rod is rotatably connected in the transmission groove, a moving block is threadedly connected to the threaded rod, a radial tooth plate is fixedly connected to the bottom of the moving block, the end of the transmission shaft is fixedly connected to the corresponding threaded rod, the upper end of the rotating shaft is fixedly connected to a pinion, and the pinion is meshed with the corresponding tooth plate.

[0011] Preferably, the two sides and the bottom of the gate are provided with connected U-shaped sealing grooves, the notch of the U-shaped sealing groove is installed with a sealing strip that contacts the inner wall of the gate frame, a U-shaped air cushion is also installed in the U-shaped sealing groove, and an air pump that can inflate the U-shaped air cushion is installed on the top of the gate.

[0012] Preferably, a radial strip cavity is provided in the top of the gate, a double-headed threaded rod is rotatably connected in the strip cavity, both ends of the double-headed threaded rod are threadedly connected with L-shaped movable arms, and strip openings are provided on both sides of the gate for the corresponding L-shaped movable arms to pass through, and the bottom of the passing end of the L-shaped movable arm is fixedly connected to the corresponding side suspension arm, and a second motor that can drive the double-headed threaded rod to rotate is installed in the gate.

[0013] Preferably, a hydraulic cylinder is fixedly mounted on the top of the boom, and a vertical telescopic end of the hydraulic cylinder is fixedly connected to the retaining net.

[0014] Preferably, slideways are provided on both sides of the top of the gate, and the inner end of the boom is slidably connected in the slideways.

[0015] The present invention also provides a method for using a rotary water conservancy engineering gate, comprising the following steps:

[0016] S1, gate closed state: the sealing strips on both sides and the bottom of the gate contact the two sides and the bottom of the gate frame to achieve sealing, and the air pump is started to inflate the U-shaped air cushion to expand and squeeze the sealing strips to further improve the sealing effect;

[0017] S2, gate incompletely opened state: start the first motor, drive multiple second bevel gears to rotate synchronously through the first bevel gear, drive multiple threaded rods to rotate synchronously through the transmission shaft, drive the toothed plate to move radially through the moving block, drive the small gear to rotate clockwise, drive the toothed plate to rotate through the rotating shaft and multiple large gears, and finally drive the gate to rotate through the gate shaft. The gate is opened within the range of °-°, which is adjusted according to the discharge volume;

[0018] S3, gate maximum opening state: through the S operation process, the gate is turned to a state parallel to the river channel, maximizing drainage and responding quickly;

[0019] S4, floating object interception state: if it is necessary to intercept floating objects, first start the hydraulic cylinder to drive the retaining net to descend to the corresponding height according to the water level; start the second motor to rotate the double-headed threaded rod according to the opening angle of the gate, and drive the two sides of the suspension arms to move backwards through a pair of L-shaped moving arms, thereby driving the two sides of the retaining net to move backwards, so that the ends of the retaining nets touch the inner wall of the river channel to intercept the flowing water; when the gate is in the maximum open state, the retaining nets on both sides are in the middle, and the ends touch the inner wall of the gate frame to achieve the interception of floating objects.

[0020] The beneficial effects of the present invention are:

[0021] 1. The gate is opened by rotating the gate shaft. You only need to start the first motor, and the first bevel gear will synchronously drive the multiple second bevel gears to rotate, and the transmission shaft will drive the multiple threaded rods to rotate synchronously, and the moving block will drive the toothed plate to move radially, and the small gear will rotate clockwise. The rotating shaft and multiple large gears will jointly drive the toothed plate to rotate, and finally the gate shaft will drive the gate to rotate. The gate opens within the range of °-°, and is adjusted according to the drainage volume. It responds quickly when the flood discharge is maximized, maximizes drainage, and rotates to open. Compared with the lifting opening method, the gate rotation can scrape off the attachments on the inner wall of the gate frame, while conventional lifting is prone to accumulate debris in the groove of the gate frame, resulting in incomplete closure of the gate.

[0022] 2. The above opening and closing mechanism is used to drive the gate shaft to rotate, which can disperse the force points and avoid the situation of tooth disengagement and tooth breakage caused by using conventional components, thus greatly improving the stability of opening.

[0023] 3. By installing a pair of booms and a pair of retaining nets, during the normal use of the gate, according to the water level, start the hydraulic cylinder to drive the retaining net to drop to the corresponding height. According to the opening angle of the gate, start the second motor to drive the double-headed threaded rod to rotate, and drive the booms on both sides to move back to back through a pair of L-shaped moving arms, thereby driving the retaining nets on both sides to move back to back, so that the ends of the retaining nets touch the inner wall of the river channel to intercept the flowing water. When the gate is in the maximum open state, the retaining nets on both sides are in the middle and the ends touch the inner wall of the gate frame, so as to intercept floating objects and clean up river garbage.

[0024] 4. By installing the sealing strip and U-shaped air cushion, the gate is in a closed state, the sealing strip contacts the inner walls and bottom wall on both sides of the gate frame to achieve sealing, and the air pump is started to inflate the U-shaped air cushion to expand and squeeze the sealing strip to further improve the sealing effect. The air pump can be actively started when a leak occurs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a front view of the present invention;

[0026] Figure 2 It is a top cross-sectional schematic diagram of the present invention;

[0027] Figure 3 for Figure 2 A schematic diagram of the structure enlargement at point A;

[0028] Figure 4 This is a schematic cross-sectional view of the top of the gate proposed by the present invention;

[0029] Figure 5 This is a top view cross-sectional schematic diagram of the opening and closing box proposed by the present invention;

[0030] Figure 6 This is a schematic diagram of the top of the opening and closing box proposed by the present invention;

[0031] Figure 7 It is a schematic diagram of the incompletely opened state of the present invention;

[0032] Figure 8 This is a schematic diagram of the maximized opening state of the present invention.

[0033] In the figure: 1 river channel, 2 gate frame, 3 first motor, 4 opening and closing box, 5 air pump, 6 gate shaft, 7 hydraulic cylinder, 8 strip mouth, 9 L-type moving arm, 10 hanging arm, 11 retaining net, 12 gate, 13 sealing strip, 14 U-type sealing groove, 15 U-type air cushion, 16 double-headed threaded rod, 17 transmission shaft, 18 second motor, 19 strip cavity, 20 tooth plate, 21 moving block, 22 toothed disc, 23 large gear, 24 small gear, 25 rotating shaft, 26 circular cavity, 27 threaded rod, 28 transmission groove, 29 first bevel gear, 30 second bevel gear. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0035] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0036] Reference Figure 1-8 A rotary water conservancy engineering gate comprises a gate frame 2 cast on a river channel 1, a gate shaft 6 is rotatably connected at the center of the gate frame 2, a gate 12 adapted to the gate frame 2 is fixedly connected to the bottom of the gate shaft 6, both sides and the bottom of the gate 12 are in contact with the inner wall of the gate frame 2 and sealed, an opening and closing mechanism that can drive the gate shaft 6 to rotate and open and close is installed on the top of the gate frame 2, the opening and closing mechanism comprises an opening and closing box 4 fixedly installed on the top of the gate frame 2, the upper end of the gate shaft 6 extends into the opening and closing box 4 and is fixedly connected to a toothed disc 22, a plurality of rotating shafts 25 are rotatably connected around the toothed disc 22 in the opening and closing box 4, and the rotating shaft 25 is fixedly connected to the toothed disc 22. The disc 22 is meshed with a large gear 23, and a driving mechanism that can synchronously drive multiple large gears 23 to rotate is also installed in the opening and closing box 4. Multiple large gears 23 jointly drive the toothed disc 22 to rotate, and multiple large gears 23 jointly drive the toothed disc 22 to rotate, and finally drive the gate 12 to rotate through the gate shaft 6. The gate 12 opens within the range of 0°-90°, and is adjusted according to the drainage volume. It responds quickly when the flood discharge is maximized, maximizes drainage, and rotates to open. Compared with the lifting opening method, the rotation of the gate 12 can scrape off the attachments on the inner wall of the gate frame 2, while conventional lifting is prone to accumulate debris in the groove of the gate frame, causing incomplete closure of the gate 12.

[0037] Specifically, the driving mechanism includes a first transmission assembly and multiple second transmission assemblies. The first transmission assembly is used to synchronously drive the multiple second transmission assemblies. The multiple second transmission assemblies correspond to the multiple large gears 23 one by one. The first transmission assembly includes a circular cavity 26 arranged at the top of the opening and closing box 4. The top of the opening and closing box 4 is fixedly installed with a first motor 3. The output end of the first motor 3 extends into the circular cavity 26 and is fixedly connected with a first bevel gear 29. The circumferential inner wall of the circular cavity 26 is rotatably connected with multiple transmission shafts 17. The transmission shaft 17 is fixedly connected with a second bevel gear 30 meshing with the first bevel gear 29. The end of the transmission shaft 17 is used to drive the second transmission assembly. The second transmission assembly includes a plurality of transmission grooves 28 radially opened at the top of the opening and closing box 4. The transmission grooves 28 are rotatably connected to the transmission shaft 17. A threaded rod 27 is connected, and a moving block 21 is threadedly connected to the threaded rod 27. A radial toothed plate 20 is fixedly connected to the bottom of the moving block 21. The end of the transmission shaft 17 is fixedly connected to the corresponding threaded rod 27. The upper end of the rotating shaft 25 is fixedly connected to a pinion 24. The pinion 24 meshes with the corresponding toothed plate 20. It only needs to start the first motor 3, and the multiple second bevel gears 30 are synchronously driven to rotate through the first bevel gear 29, and the multiple threaded rods 27 are driven to rotate synchronously through the transmission shaft 17. The toothed plate 20 is driven to move radially through the moving block 21, and the pinion 24 is driven to rotate clockwise. The toothed disc 22 is driven to rotate together through the rotating shaft 25 and the multiple large gears 23, which can disperse the force points, avoid the situation of tooth disengagement and tooth breakage when using conventional components, and greatly improve the stability of opening.

[0038] A radially movable boom 10 is installed on both sides of the gate 12. The boom 10 is arranged vertically to the gate 12. A liftable retaining net 11 is arranged below the boom 10 along its length direction. The retaining net 11 is used to intercept floating objects on the water surface. A radial strip cavity 19 is arranged in the top of the gate 12. A double-headed threaded rod 16 is rotatably connected in the strip cavity 19. Both ends of the double-headed threaded rod 16 are threadedly connected to an L-shaped movable arm 9. A strip opening 8 for the corresponding L-shaped movable arm 9 to pass through is arranged on both sides of the gate 12. The bottom of the passing end of the L-shaped movable arm 9 is fixedly connected to the corresponding side boom 10. A second motor 18 that can drive the double-headed threaded rod 16 to rotate is installed in the gate 12. A hydraulic The pressure cylinder 7, the vertical telescopic end of the hydraulic cylinder 7 is fixedly connected to the retaining net 11, and slideways are provided on both sides of the top of the gate 12. The inner end of the boom 10 is slidably connected in the slideway. According to the water level, the hydraulic cylinder 7 is started to drive the retaining net 11 to descend to the corresponding height. According to the opening angle of the gate 12, the second motor 18 is started to drive the double-headed threaded rod 16 to rotate, and the booms 10 on both sides are driven to move back to back through a pair of L-shaped moving arms 9, thereby driving the retaining nets 11 on both sides to move back to back, so that the ends of the retaining nets 11 touch the inner wall of the river channel 1 to intercept the flowing water. When the gate 12 is in the maximum open state, the retaining nets 11 on both sides are in the middle, and the ends touch the inner wall of the gate frame 2, so as to intercept floating objects and clean up river garbage.

[0039] In addition, a connected U-shaped sealing groove 14 is provided on both sides and the bottom of the gate 12, and a sealing strip 13 is installed at the notch of the U-shaped sealing groove 14 to abut against the inner wall of the gate frame 2. A U-shaped air cushion 15 is also installed in the U-shaped sealing groove 14, and an air pump 5 for inflating the U-shaped air cushion 15 is installed on the top of the gate 12. When the gate 12 is in a closed state, the sealing strip 13 abuts against the inner walls and bottom wall of both sides of the gate frame 2 to achieve sealing. The air pump 5 is started to inflate the U-shaped air cushion 15 to expand and squeeze the sealing strip 13, thereby further improving the sealing effect. The air pump 5 can be actively started when a leakage point occurs.

[0040] The present invention also provides a method for using a rotary water conservancy engineering gate, comprising the following steps:

[0041] S1, gate closed state: the sealing strips 13 on both sides and the bottom of the gate 12 contact the both sides and the bottom of the gate frame 2 to achieve sealing, and the air pump 5 is started to inflate the U-shaped air cushion 15 to expand and squeeze the sealing strips 13 to further improve the sealing effect;

[0042] S2, gate incompletely opened state: start the first motor 3, drive the multiple second bevel gears 30 to rotate synchronously through the first bevel gear 29, drive the multiple threaded rods 27 to rotate synchronously through the transmission shaft 17, drive the toothed plate 20 to move radially through the moving block 21, drive the small gear 24 to rotate clockwise, drive the toothed plate 22 to rotate through the rotating shaft 25 and the multiple large gears 23, and finally drive the gate 12 to rotate through the gate shaft 6, and the gate 12 is opened within the range of 0°-90°, which is adjusted according to the water discharge;

[0043] S3, gate maximum opening state: through the operation process of S2, the gate 12 is turned to be parallel to the river channel 1, maximizing drainage and having a fast response speed;

[0044] S4, floating object interception state: if it is necessary to intercept floating objects, first start the hydraulic cylinder 7 according to the water level to drive the retaining net 11 to descend to the corresponding height, and start the second motor 18 to drive the double-headed threaded rod 16 to rotate according to the opening angle of the gate 12, and drive the two side booms 10 to move away from each other through a pair of L-shaped movable arms 9, thereby driving the two side retaining nets 11 to move away from each other, so that the ends of the retaining nets 11 touch the inner wall of the river channel 1 to intercept the flowing water. When the gate 12 is in the maximum open state, the retaining nets 11 on both sides are in the middle, and the ends touch the inner wall of the gate frame 2 to achieve the interception of floating objects.

[0045] Working principle: Start the first motor 3, drive multiple second bevel gears 30 to rotate synchronously through the first bevel gear 29, drive multiple threaded rods 27 to rotate synchronously through the transmission shaft 17, drive the toothed plate 20 to move radially through the moving block 21, drive the small gear 24 to rotate clockwise, drive the toothed plate 22 to rotate through the rotating shaft 25 and multiple large gears 23, and finally drive the gate 12 to rotate through the gate shaft 6. The gate 12 opens within the range of 0°-90° and is adjusted according to the drainage volume. The incomplete opening state is as follows Figure 7 As shown, when maximum flood discharge is required, the gate 12 is turned to be parallel to the river channel 1 to maximize drainage and respond quickly. Figure 8 Status shown.

[0046] If it is necessary to intercept floating objects, first start the hydraulic cylinder 7 according to the water level to drive the retaining net 11 to descend to the corresponding height, and start the second motor 18 to drive the double-headed threaded rod 16 to rotate according to the opening angle of the gate 12. Through a pair of L-shaped movable arms 9, the two side booms 10 are driven to move away from each other, and then the two side retaining nets 11 are driven to move away from each other, so that the ends of the retaining nets 11 touch the inner wall of the river channel 1 to intercept the flowing water. When the gate 12 is in the maximum open state, the retaining nets 11 on both sides are in the middle, and the ends touch the inner wall of the gate frame 2 to achieve the interception of floating objects.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A rotary hydraulic engineering gate, comprising a gate frame (2) cast on a river channel (1), characterized in that: A gate shaft (6) is rotatably connected to the center of the gate frame (2); a gate (12) adapted to the gate frame (2) is fixedly connected to the bottom of the gate shaft (6); both sides and the bottom of the gate (12) are in contact and sealed with the inner wall of the gate frame (2); an opening and closing mechanism capable of driving the gate shaft (6) to rotate and open and close is installed on the top of the gate frame (2); radially movable suspension arms (10) are installed on both sides of the gate (12); the suspension arms (10) are arranged perpendicular to the gate (12); a liftable retaining net (11) is arranged below the suspension arm (10) along its length direction; the retaining net (11) is used to intercept floating objects on the water surface.

2. A rotary water conservancy engineering gate according to claim 1, characterized in that: The opening and closing mechanism comprises an opening and closing box (4) fixedly mounted on the top of the gate frame (2); the upper end of the gate shaft (6) extends into the opening and closing box (4) and is fixedly connected to a toothed disc (22); a plurality of rotating shafts (25) are rotatably connected around the toothed disc (22) in the opening and closing box (4); a large gear (23) meshing with the toothed disc (22) is fixedly connected to the rotating shaft (25); a driving mechanism capable of synchronously driving the plurality of large gears (23) to rotate is also installed in the opening and closing box (4); the plurality of large gears (23) jointly drive the toothed disc (22) to rotate.

3. A rotary water conservancy engineering gate according to claim 2, characterized in that: The driving mechanism comprises a first transmission assembly and a plurality of second transmission assemblies, wherein the first transmission assembly is used to synchronously drive the plurality of second transmission assemblies, and the plurality of second transmission assemblies correspond one to one to a plurality of large gears (23).

4. A rotary water conservancy engineering gate according to claim 3, characterized in that: The first transmission assembly comprises a circular cavity (26) arranged at the top of the opening and closing box (4); a first motor (3) is fixedly installed on the top of the opening and closing box (4); an output end of the first motor (3) extends into the circular cavity (26) and is fixedly connected to a first bevel gear (29); a plurality of transmission shafts (17) are rotatably connected to the circumferential inner wall of the circular cavity (26); a second bevel gear (30) meshing with the first bevel gear (29) is fixedly connected to the transmission shaft (17); and the end of the transmission shaft (17) is used to drive the second transmission assembly.

5. A rotary water conservancy engineering gate according to claim 4, characterized in that: The second transmission assembly comprises a plurality of transmission grooves (28) radially opened at the top of the opening and closing box (4), a threaded rod (27) being rotatably connected in the transmission groove (28), a moving block (21) being threadedly connected on the threaded rod (27), a radial toothed plate (20) being fixedly connected at the bottom of the moving block (21), the end of the transmission shaft (17) being fixedly connected to the corresponding threaded rod (27), the upper end of the rotating shaft (25) being fixedly connected to a pinion (24), and the pinion (24) being meshed with the corresponding toothed plate (20).

6. A rotary water conservancy engineering gate according to claim 1, characterized in that: The gate (12) is provided with a U-shaped sealing groove (14) connected to each other on both sides and the bottom. The notch of the U-shaped sealing groove (14) is provided with a sealing strip (13) which abuts against the inner wall of the gate frame (2). A U-shaped air cushion (15) is also provided in the U-shaped sealing groove (14). An air pump (5) which can inflate the U-shaped air cushion (15) is provided on the top of the gate (12).

7. A rotary water conservancy engineering gate according to claim 1, characterized in that: A radial strip cavity (19) is provided in the top of the gate (12), a double-threaded rod (16) is rotatably connected in the strip cavity (19), both ends of the double-threaded rod (16) are threadedly connected to L-shaped movable arms (9), both sides of the gate (12) are provided with strip openings (8) for the corresponding L-shaped movable arms (9) to pass through, the bottom of the passing end of the L-shaped movable arm (9) is fixedly connected to the corresponding side suspension arm (10), and a second motor (18) is installed in the gate (12) to drive the double-threaded rod (16) to rotate.

8. The rotary water conservancy engineering gate according to claim 1, characterized in that: A hydraulic cylinder (7) is fixedly mounted on the top of the boom (10), and a vertical telescopic end of the hydraulic cylinder (7) is fixedly connected to the retaining net (11).

9. The rotary water conservancy engineering gate according to claim 1, characterized in that: Slideways are provided on both sides of the top of the gate (12), and the inner end of the suspension arm (10) is slidably connected in the slideways.

10. A method for using a rotary water conservancy engineering gate according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, gate closed state: the sealing strips (13) on both sides and the bottom of the gate (12) contact the both sides and the bottom of the gate frame (2) to achieve sealing, and the air pump (5) is started to inflate the U-shaped air cushion (15) to expand and squeeze the sealing strips (13), thereby further improving the sealing effect; S2, gate incompletely opened state: start the first motor (3), drive the plurality of second bevel gears (30) to rotate synchronously through the first bevel gear (29), drive the plurality of threaded rods (27) to rotate synchronously through the transmission shaft (17), drive the toothed plate (20) to move radially through the moving block (21), drive the small gear (24) to rotate clockwise, drive the toothed plate (22) to rotate jointly through the rotating shaft (25) and the plurality of large gears (23), and finally drive the gate (12) to rotate through the gate shaft (6), and the gate (12) is opened within the range of (0)°-(90)°, adjusted according to the discharge volume; S3, gate maximum opening state: through the operation process of S (2), the gate (12) is turned to a state parallel to the river channel (1), maximizing drainage and having a fast response speed; S4, floating object interception state: if it is necessary to intercept floating objects, firstly, according to the water level, the hydraulic cylinder (7) is started to drive the retaining net (11) to descend to a corresponding height, and according to the opening angle of the gate (12), the second motor (18) is started to drive the double-headed threaded rod (16) to rotate, and the two side suspension arms (10) are driven to move in opposite directions through a pair of L-shaped movable arms (9), thereby driving the retaining nets (11) on both sides to move in opposite directions, so that the ends of the retaining nets (11) touch the inner wall of the river channel (1) to intercept the flowing water, and when the gate (12) is in the maximum opening state, the retaining nets (11) on both sides are in the middle, and the ends touch the inner wall of the gate frame (2), thereby achieving the interception of floating objects.

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